Schwitz



R. voLL-s-GHWITZ.

Look.

Patented May 4, 1880.

, w w G AW Ny PETERS, PHoTn-LITMOGRAPMER, WASHINGTON, u u.

UNTTE STATES PATENT OFFICE.

RUDOLPH VOLLSGHWITZ, OF ELIZABETH, NEW JERSEY.

LOCK.

SPECIFICATION forming part of Letters Patent No. 227,327, dated May 4,1880.

Application led September 8, 1879.

To all whom it 'may concern:

Be it known that I, RUDOLPH VOLL- SCHWI'IZ, of Elizabeth, in the countyof Union and State of New Jersey, have invented anew and usefulImprovement in Locks, which improvement is fully set forth in thefollowing specification, reference being had to the accompanyingdrawings, in which- Figure l represents a top view of my lock. Fig. 2 isa longitudinal section thereof, showing the tumbler. Fig. 3 is a similarsection, showing the bolt-operating device. Fig. 4 is a cross-section inthe plane of the line x m, Fig. 3.

Similar letters indicate corresponding parts.

' My invention is especially adapted to locks Jfor pianos,sewing-machine cases, &c.; and it consists in the combination of atoothed bolt constructed to embrace and slide upon a hat guide-plate, aspiral head which is swiveled on the outer end of the bolt and iittedinto a slot in the lock-case, so that when the bolt is shot or retractedthe spiral head turns, and thus is adapt-ed to engage and disengage aslotted plate aflixed to the article to be locked, a' toothed diskvarranged in a recess in the before-mentioned iiat guide-plate, whichdisk meshes with the teeth oi the bolt and is adapted to receive the keyfor rotating the same, and a spring-tumbler acting on the bolt, so thatwhen the key is inserted in the lock and turned the tumbler isdisplaced, thereby releasing the bolt, and the latter is sliot orretracted by the action of the toothed disk turning with the key, all ofwhich will be fully hereinafter described in detail.

In the drawings, the letter A designates the lock-case, consisting of acylindrical body and a face-plate at one end oi' such body. B is thebolt, having teeth a; G, a spiral head swiveled on the outer end of thebolt, as at b, and itted into a slot, c, in the face-plate of thelock-case. D is the toothed disk, having a central slot, d, to receive akey, marked E. F is the tumbler acting on the bolt, and G the boltguide.rIhis bolt-guide Gis substantially hat, and the bolt B is fitted thereonas shown in Fig. 4.

The teeth a of the bolt are formed by perforatiug the same at anappropriate point, the part between each perforation constituting atooth.

In the bolt-guide G is a recess, e, in which the toothed disk D is tted,and this disk is of such a diameter that the same meshes with the teethof the bolt from an inner direction, as shown in Fig. 3.

The tumbler F consists ofa wire spring,-

which is coiled on a pin, f, whereby the boltguide Gr is secured in thelock-case, and one arm of which engages a stump, h, projecting from thebolt, the other arm thereofl being also allowed to bear on this stump.

To adapt the spring-tumbler F to engage the stump h of the bolt, thetumbler is provided With an oset, i, catching over or under the stump,as the case may be; but this can also be accomplished in other Ways, asby piercing the stump and bending the tumbler so as to enter the hole.

As the bolt B is shot or retracted the spiral head C is caused to turnon its axis by its contact with the edge of the slot c, and hence thishead is adapted to engage and disengage a slotted plate, substantiallysimilar to the face-plate of the lock-case, affixed to the part orarticle to be locked.

For the purpose of impelling the bolt B the key E is inserted through ahole, j, in the lock-case, when the key passes between the two arms ofthe tumbler F into the slot of the toothed disk D. The key is thenturned, when the tumbler F is displaced, so as to release the bolt B,and after this is accomplished the bolt is moved in or out, as the casemay be, by the action of the toothed disk D, which partakes of themotion of the key.

It will be seen that by the peculiar arrangement of the bolt B and thetoothed disk D the lock is brought within a very small compass.

What I claim as new, and desire to secure by Letters Patent, is

The combination oi' the lock-case, the iiat bolt-guide Gr, having arecess, c, and the toothed disk D, arranged in said recess and having anopening for the passage of a key, with the bolt B, embracing theguide-plate and adapted to slide thereon, and provided In testimony thatI claim the foregoing I with a series of teeth, a, and a projection orhave hereunto set my hand and seal this 23d 1o stump, h, the spiral headC, swiveled on the day of August, 1879.

end of the bolt end fitted in a slot in the lock- 5 ease,.and thespring-tumbler F, composed of RUDOLPH VOLISCHWTZ' [L' S'] two arms,which bear upon the projection or Witnesses: stump on the bolt, allsubstantially as and for W. HAUFF, the purposes set forth. E. F.KASTENHUBER.

